i9 BIOS
Leo-Patch 1.6 · Q1HY MoDT · Observations 14 October 2026

PCIe and Graphics

PCI Express Root Port 14

PCI Express Root Port 14 firmware setup page decoded from AMI HII/IFR resources.

Form ID
0x13f1
Records
34
Path
Setup / Chipset / PCH-IO Configuration / PCI Express Configuration / PCI Express Root Port 14

Record 3718

PCI Express Root Port 14

Firmware Value

Control the PCI Express Root Port.

Opcode
OneOf
Question ID
0xda2
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x10c
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Record 3719

Connection Type

Firmware Value

Built-In: a built-in device is connected to this rootport.

Firmware help text

Built-In: a built-in device is connected to this rootport. SlotImplemented bit will be clear. Slot: this rootport connects to user-accessible slot. SlotImplemented bit will be set.

Opcode
OneOf
Question ID
0xda3
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x374
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Built-in
1SlotStandard default

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}
  • {"condition_id": 1586, "type": "GrayOutIf", "offset": 491954, "expr": ["EqIdVal QuestionId: 0xDB0, Value: 0x1"]}

Record 3720

ASPM

Firmware Value

Set the ASPM Level: Force L0s - Force all links to L0s State AUTO - BIOS auto configure DISABLE - Disables ASPM

Firmware help text

Set the ASPM Level: Force L0s - Force all links to L0s State AUTO - BIOS auto configure DISABLE - Disables ASPM

Opcode
OneOf
Question ID
0x15ed
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x128
Width
1 byte(s)
Range
0 to 4 step 0
ValueLabelMarkers
0DisabledStandard default
2L1
4Auto

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3721

L1 Substates

Firmware Value

PCI Express L1 Substates settings.

Opcode
OneOf
Question ID
0x1609
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x2cc
Width
1 byte(s)
Range
0 to 2 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1L1.1
2L1.1 & L1.2

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3722

L1 Low

Firmware Value

PCI Express L1 Low Substate Enable/Disable.

Opcode
OneOf
Question ID
0xda4
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x2e8
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3723

ACS

Firmware Value

Enable/Disable Access Control Services Extended Capability

Opcode
OneOf
Question ID
0xda5
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x304
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3724

PTM

Firmware Value

Enable/Disable Precision Time Measurement

Opcode
OneOf
Question ID
0x1625
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x320
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3725

DPC

Firmware Value

Enable/Disable Downstream Port Containment

Opcode
OneOf
Question ID
0xda6
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x33c
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3726

EDPC

Firmware Value

Enable/Disable Rootport extensions for Downstream Port Containment

Opcode
OneOf
Question ID
0xda7
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x358
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3727

URR

Firmware Value

PCI Express Unsupported Request Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xda8
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x144
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3728

FER

Firmware Value

PCI Express Device Fatal Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xda9
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x160
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3729

NFER

Firmware Value

PCI Express Device Non-Fatal Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xdaa
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x17c
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3730

CER

Firmware Value

PCI Express Device Correctable Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xdab
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x198
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3731

SEFE

Firmware Value

Root PCI Express System Error on Fatal Error Enable/Disable.

Opcode
OneOf
Question ID
0xdac
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x1ec
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3732

SENFE

Firmware Value

Root PCI Express System Error on Non-Fatal Error Enable/Disable.

Opcode
OneOf
Question ID
0xdad
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x208
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3733

SECE

Firmware Value

Root PCI Express System Error on Correctable Error Enable/Disable.

Opcode
OneOf
Question ID
0xdae
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x224
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3734

PME SCI

Firmware Value

PCI Express PME SCI Enable/Disable.

Opcode
OneOf
Question ID
0xdaf
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x240
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3735

Hot Plug

Firmware Value

PCI Express Hot Plug Enable/Disable.

Opcode
OneOf
Question ID
0xdb0
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x25c
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}
  • {"condition_id": 1587, "type": "GrayOutIf", "offset": 492506, "expr": ["EqIdVal QuestionId: 0xDA3, Value: 0x0"]}

Record 3736

Advanced Error Reporting

Firmware Value

Advanced Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xdb1
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x278
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3737

PCIe Speed

Firmware Value

Configure PCIe Speed

Opcode
OneOf
Question ID
0xdb2
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x294
Width
1 byte(s)
Range
0 to 3 step 0
ValueLabelMarkers
0AutoStandard default
1Gen1
2Gen2
3Gen3

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3738

Transmitter Half Swing

Firmware Value

Transmitter Half Swing Enable/Disable.

Opcode
OneOf
Question ID
0xdb3
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x2b0
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3739

Detect Timeout

Firmware Value

The number of milliseconds reference code will wait for link to exit Detect state for enabled ports before assuming there is no device and potentially disabling the port.

Opcode
Numeric
Question ID
0xdb4
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x39d
Width
2 byte(s)
Range
0 to 65535 step 1

Default store records

Store IDStore labelValueOption label
0Standard0

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3740

Extra Bus Reserved

Firmware Value

Extra Bus Reserved (0-7) for bridges behind this Root Bridge.

Opcode
Numeric
Question ID
0xdb5
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x52c
Width
1 byte(s)
Range
0 to 7 step 1

Default store records

Store IDStore labelValueOption label
0Standard0

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3741

Reserved Memory

Firmware Value

Reserved Memory for this Root Bridge (1-20) MB

Opcode
Numeric
Question ID
0xdb6
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x555
Width
2 byte(s)
Range
1 to 20 step 1

Default store records

Store IDStore labelValueOption label
0Standard10

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3742

Reserved I/O

Firmware Value

Reserved I/O (4K/8K/12K/16K/20K) Range for this Root Bridge.

Opcode
Numeric
Question ID
0xdb7
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x580
Width
1 byte(s)
Range
4 to 20 step 4

Default store records

Store IDStore labelValueOption label
0Standard4

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3743

LTR

Firmware Value

PCH PCIE Latency Reporting Enable/Disable

Opcode
OneOf
Question ID
0xdb8
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x3f0
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3744

Snoop Latency Override

Firmware Value

Snoop Latency Override for PCH PCIE.

Firmware help text

Snoop Latency Override for PCH PCIE. Disabled: Disable override. Manual: Manually enter override values. Auto (default): Maintain default BIOS flow.

Opcode
OneOf
Question ID
0xdb9
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x428
Width
1 byte(s)
Range
0 to 2 step 0
ValueLabelMarkers
0Disabled
1Manual
2AutoStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}
  • {"condition_id": 1588, "type": "SuppressIf", "offset": 492821, "expr": ["EqIdVal QuestionId: 0xDB8, Value: 0x0"]}

Record 3745

Snoop Latency Value

Firmware Value

LTR Snoop Latency value of PCH PCIE

Opcode
Numeric
Question ID
0xdba
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x4a5
Width
2 byte(s)
Range
0 to 1023 step 1

Default store records

Store IDStore labelValueOption label
0Standard60

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}
  • {"condition_id": 1588, "type": "SuppressIf", "offset": 492821, "expr": ["EqIdVal QuestionId: 0xDB8, Value: 0x0"]}
  • {"condition_id": 1589, "type": "SuppressIf", "offset": 492869, "expr": ["EqIdVal QuestionId: 0xDB9, Value: 0x1", "Not"]}

Record 3746

Snoop Latency Multiplier

Firmware Value

LTR Snoop Latency Multiplier of PCH PCIE

Opcode
OneOf
Question ID
0xdbb
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x444
Width
1 byte(s)
Range
0 to 5 step 0
ValueLabelMarkers
01 ns
132 ns
21024 nsStandard defaultManufacturing default
332768 ns
41048576 ns
533554432 ns

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}
  • {"condition_id": 1588, "type": "SuppressIf", "offset": 492821, "expr": ["EqIdVal QuestionId: 0xDB8, Value: 0x0"]}
  • {"condition_id": 1589, "type": "SuppressIf", "offset": 492869, "expr": ["EqIdVal QuestionId: 0xDB9, Value: 0x1", "Not"]}

Record 3747

Non Snoop Latency Override

Firmware Value

Non Snoop Latency Override for PCH PCIE.

Firmware help text

Non Snoop Latency Override for PCH PCIE. Disabled: Disable override. Manual: Manually enter override values. Auto (default): Maintain default BIOS flow.

Opcode
OneOf
Question ID
0xdbc
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x460
Width
1 byte(s)
Range
0 to 2 step 0
ValueLabelMarkers
0Disabled
1Manual
2AutoStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}
  • {"condition_id": 1588, "type": "SuppressIf", "offset": 492821, "expr": ["EqIdVal QuestionId: 0xDB8, Value: 0x0"]}

Record 3748

Non Snoop Latency Value

Firmware Value

LTR Non Snoop Latency value of PCH PCIE

Opcode
Numeric
Question ID
0xdbd
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x4dd
Width
2 byte(s)
Range
0 to 1023 step 1

Default store records

Store IDStore labelValueOption label
0Standard60

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}
  • {"condition_id": 1588, "type": "SuppressIf", "offset": 492821, "expr": ["EqIdVal QuestionId: 0xDB8, Value: 0x0"]}
  • {"condition_id": 1590, "type": "SuppressIf", "offset": 493013, "expr": ["EqIdVal QuestionId: 0xDBC, Value: 0x1", "Not"]}

Record 3749

Non Snoop Latency Multiplier

Firmware Value

LTR Non Snoop Latency Multiplier of PCH PCIE

Opcode
OneOf
Question ID
0xdbe
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x47c
Width
1 byte(s)
Range
0 to 5 step 0
ValueLabelMarkers
01 ns
132 ns
21024 nsStandard defaultManufacturing default
332768 ns
41048576 ns
533554432 ns

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}
  • {"condition_id": 1588, "type": "SuppressIf", "offset": 492821, "expr": ["EqIdVal QuestionId: 0xDB8, Value: 0x0"]}
  • {"condition_id": 1590, "type": "SuppressIf", "offset": 493013, "expr": ["EqIdVal QuestionId: 0xDBC, Value: 0x1", "Not"]}

Record 3750

LTR Lock

Firmware Value

PCIE LTR Configuration Lock

Opcode
OneOf
Question ID
0xdbf
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x40c
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}

Record 3751

Peer Memory Write Enable

Firmware Value

Peer Memory Write Enable/Disable

Opcode
OneOf
Question ID
0xdc0
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0xcb
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]}